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EP 3 013 742 A1

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(43) Date of publication: 04.05.2016 Bulletin 2016/18 (21) Application number: 13786539.0 (22) Date of filing: 24.09.2013

(51) International Patent Classification (IPC):  C01B 25/37(2006.01) B01J 21/18(2006.01) B01J 35/00(2006.01) C01B 31/04(2006.01) B01J 23/50(2006.01) (86) International application number: PCT/IN2013/000575 (87) International publication number: WO 2014/207754 (31.12.2014 Gazette 2014/53)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME (30) Priority: 25.06.2013 IN DE18702013 (71) Applicant: Council of Scientific & Industrial Research An Indian registered body incorporated under the Registration of Societies Act (Act XXI of 1860) New Delhi 110 001 (IN)

(72) Inventors: DAS, Dipti Prakasini Bhubaneswar 751013 Orissa (IN) SAMAL, Alaka Bhubaneswar 751013 Orissa (IN) DAS, Jasobanta Bhubaneswar 751013 Orissa (IN) DASH, Ajit Bhubaneswar 751013 Orissa (IN) (74) Representative: Boult Wade Tennant  Verulam Gardens 70 Gray's Inn Road London WC1X 8BT London WC1X 8BT (GB)